I use Flask for times when I need to create a REST API that interfaces with other Python code, or there is no specific reason why I'd want to use Node.JS. I prefer Flask because of its small learning curve, allowing me to get started coding as quickly as possible

Keen IO allows me to have a big data infrastructure without needing to set up and maintain the hardware and software. Their SDKs (available in many languages, my faves are Python and JavaScript) allow data to be stored, sliced and diced, and then visualized.

I use ESLint to ensure my JavaScript code meets my team's coding standards, and to avoid known pitfalls. The extensibility allows me to write specialized modules that detect team-specific issues as they occur.